v25.11.1

changelog.md

@@ -1,5 +1,39 @@
 # Changelog
 
+## 2026-03-15 - 25.11.1 - fix(rustproxy-http)
+keep connection idle tracking alive during streaming and tune HTTP/2 connection lifetimes
+
+- Propagate connection activity tracking through HTTP/1, HTTP/2, and WebSocket forwarding so active request and response body streams do not trigger the idle watchdog.
+- Update CountingBody to refresh connection activity timestamps while data frames are polled during uploads and downloads.
+- Increase pooled HTTP/2 max age and set explicit HTTP/2 connection window sizes to improve long-lived streaming behavior.
+
+## 2026-03-15 - 25.11.0 - feat(rustproxy-http)
+add HTTP/2 Extended CONNECT WebSocket proxy support
+
+- Enable HTTP/2 CONNECT protocol support on the Hyper auto connection builder
+- Detect WebSocket requests for both HTTP/1 Upgrade and HTTP/2 Extended CONNECT flows
+- Translate HTTP/2 WebSocket requests to an HTTP/1.1 backend handshake and return RFC-compliant client responses
+
+## 2026-03-12 - 25.10.7 - fix(rustproxy-http)
+remove Host header from HTTP/2 upstream requests while preserving it for HTTP/1 retries
+
+- strips the Host header before sending HTTP/2 upstream requests so :authority from the URI is used instead
+- avoids 400 responses from nginx caused by sending both Host and :authority headers
+- keeps a cloned header set for bodyless request retries so HTTP/1 fallback still retains the Host header
+
+## 2026-03-12 - 25.10.6 - fix(rustproxy-http)
+use the requested domain as HTTP/2 authority instead of the backend host and port
+
+- build HTTP/2 absolute URIs from the client-facing domain so the :authority pseudo-header matches the Host header
+- remove backend port from generated HTTP/2 request URIs and fall back to the upstream host only when no domain is available
+- apply the authority handling consistently across pooled, inline, and generic upstream request paths
+
+## 2026-03-12 - 25.10.5 - fix(rustproxy-http)
+configure HTTP/2 client builders with a Tokio timer for keep-alive handling
+
+- Adds TokioTimer to all HTTP/2 client builder instances in proxy_service.
+- Ensures configured HTTP/2 keep-alive interval and timeout settings have the required timer runtime support.
+
 ## 2026-03-12 - 25.10.4 - fix(rustproxy-http)
 stabilize upstream HTTP/2 forwarding and fallback behavior
 

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@push.rocks/smartproxy",
-  "version": "25.10.4",
+  "version": "25.11.1",
   "private": false,
   "description": "A powerful proxy package with unified route-based configuration for high traffic management. Features include SSL/TLS support, flexible routing patterns, WebSocket handling, advanced security options, and automatic ACME certificate management.",
   "main": "dist_ts/index.js",

rust/crates/rustproxy-http/src/connection_pool.rs

@@ -20,7 +20,7 @@ const IDLE_TIMEOUT: Duration = Duration::from_secs(90);
 const EVICTION_INTERVAL: Duration = Duration::from_secs(30);
 /// Maximum age for pooled HTTP/2 connections before proactive eviction.
 /// Prevents staleness from backends that close idle connections (e.g. nginx GOAWAY).
-const MAX_H2_AGE: Duration = Duration::from_secs(120);
+const MAX_H2_AGE: Duration = Duration::from_secs(300);
 
 /// Identifies a unique backend endpoint.
 #[derive(Clone, Debug, Hash, Eq, PartialEq)]

rust/crates/rustproxy-http/src/counting_body.rs

@@ -25,6 +25,11 @@ pub struct CountingBody<B> {
     direction: Direction,
     /// Whether we've already reported the bytes (to avoid double-reporting on drop).
     reported: bool,
+    /// Optional connection-level activity tracker. When set, poll_frame updates this
+    /// to keep the idle watchdog alive during active body streaming (uploads/downloads).
+    connection_activity: Option<Arc<AtomicU64>>,
+    /// Start instant for computing elapsed ms for connection_activity.
+    activity_start: Option<std::time::Instant>,
 }
 
 /// Which direction the bytes flow.
@@ -53,9 +58,20 @@ impl<B> CountingBody<B> {
             source_ip,
             direction,
             reported: false,
+            connection_activity: None,
+            activity_start: None,
         }
     }
 
+    /// Set the connection-level activity tracker. When set, each data frame
+    /// updates this timestamp to prevent the idle watchdog from killing the
+    /// connection during active body streaming.
+    pub fn with_connection_activity(mut self, activity: Arc<AtomicU64>, start: std::time::Instant) -> Self {
+        self.connection_activity = Some(activity);
+        self.activity_start = Some(start);
+        self
+    }
+
     /// Report accumulated bytes to the metrics collector.
     fn report(&mut self) {
         if self.reported {
@@ -103,6 +119,10 @@ where
             Poll::Ready(Some(Ok(frame))) => {
                 if let Some(data) = frame.data_ref() {
                     this.counted_bytes.fetch_add(data.len() as u64, Ordering::Relaxed);
+                    // Keep the connection-level idle watchdog alive during body streaming
+                    if let (Some(activity), Some(start)) = (&this.connection_activity, &this.activity_start) {
+                        activity.store(start.elapsed().as_millis() as u64, Ordering::Relaxed);
+                    }
                 }
                 Poll::Ready(Some(Ok(frame)))
             }

rust/crates/rustproxy-http/src/proxy_service.rs

@@ -33,6 +33,14 @@ use crate::request_filter::RequestFilter;
 use crate::response_filter::ResponseFilter;
 use crate::upstream_selector::UpstreamSelector;
 
+/// Per-connection context for keeping the idle watchdog alive during body streaming.
+/// Passed through the forwarding chain so CountingBody can update the timestamp.
+#[derive(Clone)]
+struct ConnActivity {
+    last_activity: Arc<AtomicU64>,
+    start: std::time::Instant,
+}
+
 /// Default upstream connect timeout (30 seconds).
 const DEFAULT_CONNECT_TIMEOUT: std::time::Duration = std::time::Duration::from_secs(30);
 
@@ -294,8 +302,9 @@ impl HttpProxyService {
             let cn = cancel_inner.clone();
             let la = Arc::clone(&la_inner);
             let st = start;
+            let ca = ConnActivity { last_activity: Arc::clone(&la_inner), start };
             async move {
-                let result = svc.handle_request(req, peer, port, cn).await;
+                let result = svc.handle_request(req, peer, port, cn, ca).await;
                 // Mark request end — update activity timestamp before guard drops
                 la.store(st.elapsed().as_millis() as u64, Ordering::Relaxed);
                 drop(req_guard); // Explicitly drop to decrement active_requests
@@ -304,8 +313,13 @@ impl HttpProxyService {
         });
 
         // Auto-detect h1 vs h2 based on ALPN / connection preface.
-        // serve_connection_with_upgrades supports h1 Upgrade (WebSocket) and h2 CONNECT.
-        let builder = hyper_util::server::conn::auto::Builder::new(hyper_util::rt::TokioExecutor::new());
+        // serve_connection_with_upgrades supports h1 Upgrade (WebSocket) and h2 Extended CONNECT (RFC 8441).
+        let mut builder = hyper_util::server::conn::auto::Builder::new(hyper_util::rt::TokioExecutor::new());
+        // Configure H2 server settings: Extended CONNECT for WebSocket + flow control tuning
+        builder.http2()
+            .enable_connect_protocol()
+            .initial_stream_window_size(2 * 1024 * 1024)        // 2MB per stream (vs default 64KB)
+            .initial_connection_window_size(8 * 1024 * 1024);   // 8MB per client connection
         let conn = builder.serve_connection_with_upgrades(io, service);
         // Pin on the heap — auto::UpgradeableConnection is !Unpin
         let mut conn = Box::pin(conn);
@@ -365,6 +379,7 @@ impl HttpProxyService {
         peer_addr: std::net::SocketAddr,
         port: u16,
         cancel: CancellationToken,
+        conn_activity: ConnActivity,
     ) -> Result<Response<BoxBody<Bytes, hyper::Error>>, hyper::Error> {
         let host = req.headers()
             .get("host")
@@ -482,16 +497,23 @@ impl HttpProxyService {
         let domain_str = host.as_deref().unwrap_or("-");
         self.upstream_selector.connection_started(&upstream_key);
 
-        // Check for WebSocket upgrade
-        let is_websocket = req.headers()
+        // Check for WebSocket upgrade: H1 (Upgrade header) or H2 Extended CONNECT (RFC 8441)
+        let is_h1_websocket = req.headers()
             .get("upgrade")
             .and_then(|v| v.to_str().ok())
             .map(|v| v.eq_ignore_ascii_case("websocket"))
             .unwrap_or(false);
 
-        if is_websocket {
+        let is_h2_websocket = req.method() == hyper::Method::CONNECT
+            && req.extensions()
+                .get::<hyper::ext::Protocol>()
+                .map(|p| p.as_str().eq_ignore_ascii_case("websocket"))
+                .unwrap_or(false);
+
+        if is_h1_websocket || is_h2_websocket {
             let result = self.handle_websocket_upgrade(
-                req, peer_addr, &upstream, route_match.route, route_id, &upstream_key, cancel, &ip_str,
+                req, peer_addr, &upstream, route_match.route, route_id, &upstream_key, cancel, &ip_str, is_h2_websocket,
+                if is_h2_websocket { Some(conn_activity.clone()) } else { None },
             ).await;
             // Note: for WebSocket, connection_ended is called inside
             // the spawned tunnel task when the connection closes.
@@ -632,7 +654,7 @@ impl HttpProxyService {
                     self.metrics.set_backend_protocol(&upstream_key, "h2");
                     let result = self.forward_h2_pooled(
                         sender, parts, body, upstream_headers, &upstream_path,
-                        route_match.route, route_id, &ip_str, &pool_key, domain_str,
+                        route_match.route, route_id, &ip_str, &pool_key, domain_str, &conn_activity,
                     ).await;
                     self.upstream_selector.connection_ended(&upstream_key);
                     return result;
@@ -771,19 +793,19 @@ impl HttpProxyService {
                 self.forward_h2_with_fallback(
                     io, parts, body, upstream_headers, &upstream_path,
                     &upstream, route_match.route, route_id, &ip_str, &final_pool_key,
-                    host.clone(), domain_str,
+                    host.clone(), domain_str, &conn_activity,
                 ).await
             } else {
                 // Explicit H2 mode: hard-fail on handshake error (preserved behavior)
                 self.forward_h2(
                     io, parts, body, upstream_headers, &upstream_path,
-                    &upstream, route_match.route, route_id, &ip_str, &final_pool_key, domain_str,
+                    &upstream, route_match.route, route_id, &ip_str, &final_pool_key, domain_str, &conn_activity,
                 ).await
             }
         } else {
             self.forward_h1(
                 io, parts, body, upstream_headers, &upstream_path,
-                &upstream, route_match.route, route_id, &ip_str, &final_pool_key, domain_str,
+                &upstream, route_match.route, route_id, &ip_str, &final_pool_key, domain_str, &conn_activity,
             ).await
         };
         self.upstream_selector.connection_ended(&upstream_key);
@@ -806,6 +828,7 @@ impl HttpProxyService {
         source_ip: &str,
         pool_key: &crate::connection_pool::PoolKey,
         domain: &str,
+        conn_activity: &ConnActivity,
     ) -> Result<Response<BoxBody<Bytes, hyper::Error>>, hyper::Error> {
         let backend_key = format!("{}:{}", pool_key.host, pool_key.port);
 
@@ -814,7 +837,7 @@ impl HttpProxyService {
             self.metrics.backend_pool_hit(&backend_key);
             return self.forward_h1_with_sender(
                 pooled_sender, parts, body, upstream_headers, upstream_path,
-                route, route_id, source_ip, pool_key, domain,
+                route, route_id, source_ip, pool_key, domain, conn_activity,
             ).await;
         }
 
@@ -837,7 +860,7 @@ impl HttpProxyService {
             }
         });
 
-        self.forward_h1_with_sender(sender, parts, body, upstream_headers, upstream_path, route, route_id, source_ip, pool_key, domain).await
+        self.forward_h1_with_sender(sender, parts, body, upstream_headers, upstream_path, route, route_id, source_ip, pool_key, domain, conn_activity).await
     }
 
     /// Common H1 forwarding logic used by both fresh and pooled paths.
@@ -853,6 +876,7 @@ impl HttpProxyService {
         source_ip: &str,
         pool_key: &crate::connection_pool::PoolKey,
         domain: &str,
+        conn_activity: &ConnActivity,
     ) -> Result<Response<BoxBody<Bytes, hyper::Error>>, hyper::Error> {
         // Always use HTTP/1.1 for h1 backend connections (h2 incoming requests have version HTTP/2.0)
         let mut upstream_req = Request::builder()
@@ -871,7 +895,7 @@ impl HttpProxyService {
             route_id.map(|s| s.to_string()),
             Some(source_ip.to_string()),
             Direction::In,
-        );
+        ).with_connection_activity(Arc::clone(&conn_activity.last_activity), conn_activity.start);
         let boxed_body: BoxBody<Bytes, hyper::Error> = BoxBody::new(counting_req_body);
 
         let upstream_req = upstream_req.body(boxed_body).unwrap();
@@ -889,7 +913,7 @@ impl HttpProxyService {
         // Return sender to pool (body streams lazily, sender is reusable once response head is received)
         self.connection_pool.checkin_h1(pool_key.clone(), sender);
 
-        self.build_streaming_response(upstream_response, route, route_id, source_ip).await
+        self.build_streaming_response(upstream_response, route, route_id, source_ip, conn_activity).await
     }
 
     /// Forward request to backend via HTTP/2 with body streaming (fresh connection).
@@ -907,15 +931,17 @@ impl HttpProxyService {
         source_ip: &str,
         pool_key: &crate::connection_pool::PoolKey,
         domain: &str,
+        conn_activity: &ConnActivity,
     ) -> Result<Response<BoxBody<Bytes, hyper::Error>>, hyper::Error> {
         let backend_key = format!("{}:{}", pool_key.host, pool_key.port);
         let exec = hyper_util::rt::TokioExecutor::new();
         let mut h2_builder = hyper::client::conn::http2::Builder::new(exec);
         h2_builder
+            .timer(hyper_util::rt::TokioTimer::new())
             .keep_alive_interval(std::time::Duration::from_secs(10))
             .keep_alive_timeout(std::time::Duration::from_secs(5))
-            .adaptive_window(true)
-            .initial_stream_window_size(2 * 1024 * 1024);
+            .initial_stream_window_size(2 * 1024 * 1024)
+            .initial_connection_window_size(16 * 1024 * 1024);
         let (sender, conn): (
             hyper::client::conn::http2::SendRequest<BoxBody<Bytes, hyper::Error>>,
             hyper::client::conn::http2::Connection<TokioIo<BackendStream>, BoxBody<Bytes, hyper::Error>, hyper_util::rt::TokioExecutor>,
@@ -941,7 +967,7 @@ impl HttpProxyService {
 
         // Clone sender for potential pool registration; register only after first request succeeds
         let sender_for_pool = sender.clone();
-        let result = self.forward_h2_with_sender(sender, parts, body, upstream_headers, upstream_path, route, route_id, source_ip, Some(pool_key), domain).await;
+        let result = self.forward_h2_with_sender(sender, parts, body, upstream_headers, upstream_path, route, route_id, source_ip, Some(pool_key), domain, conn_activity).await;
         if matches!(&result, Ok(ref resp) if resp.status() != StatusCode::BAD_GATEWAY) {
             self.connection_pool.register_h2(pool_key.clone(), sender_for_pool);
         }
@@ -963,6 +989,7 @@ impl HttpProxyService {
         source_ip: &str,
         pool_key: &crate::connection_pool::PoolKey,
         domain: &str,
+        conn_activity: &ConnActivity,
     ) -> Result<Response<BoxBody<Bytes, hyper::Error>>, hyper::Error> {
         // Save retry state for bodyless requests (cheap: Method is an enum, HeaderMap clones Arc-backed Bytes)
         let retry_state = if body.is_end_stream() {
@@ -973,7 +1000,7 @@ impl HttpProxyService {
 
         let result = self.forward_h2_with_sender(
             sender, parts, body, upstream_headers, upstream_path,
-            route, route_id, source_ip, Some(pool_key), domain,
+            route, route_id, source_ip, Some(pool_key), domain, conn_activity,
         ).await;
 
         // If the request failed (502) and we can retry with an empty body, do so
@@ -984,7 +1011,7 @@ impl HttpProxyService {
                     "Stale pooled H2 sender, retrying with fresh connection");
                 return self.retry_h2_with_fresh_connection(
                     method, headers, upstream_path,
-                    pool_key, route, route_id, source_ip, domain,
+                    pool_key, route, route_id, source_ip, domain, conn_activity,
                 ).await;
             }
         }
@@ -1003,6 +1030,7 @@ impl HttpProxyService {
         route_id: Option<&str>,
         source_ip: &str,
         domain: &str,
+        conn_activity: &ConnActivity,
     ) -> Result<Response<BoxBody<Bytes, hyper::Error>>, hyper::Error> {
         let backend_key = format!("{}:{}", pool_key.host, pool_key.port);
 
@@ -1052,10 +1080,11 @@ impl HttpProxyService {
         let exec = hyper_util::rt::TokioExecutor::new();
         let mut h2_builder = hyper::client::conn::http2::Builder::new(exec);
         h2_builder
+            .timer(hyper_util::rt::TokioTimer::new())
             .keep_alive_interval(std::time::Duration::from_secs(10))
             .keep_alive_timeout(std::time::Duration::from_secs(5))
-            .adaptive_window(true)
-            .initial_stream_window_size(2 * 1024 * 1024);
+            .initial_stream_window_size(2 * 1024 * 1024)
+            .initial_connection_window_size(16 * 1024 * 1024);
         let (mut sender, conn): (
             hyper::client::conn::http2::SendRequest<BoxBody<Bytes, hyper::Error>>,
             hyper::client::conn::http2::Connection<TokioIo<BackendStream>, BoxBody<Bytes, hyper::Error>, hyper_util::rt::TokioExecutor>,
@@ -1082,13 +1111,17 @@ impl HttpProxyService {
         });
 
         // Build request with empty body using absolute URI for H2 pseudo-headers
-        let h2_uri = format!("{}://{}:{}{}",
-            if pool_key.use_tls { "https" } else { "http" },
-            pool_key.host, pool_key.port, upstream_path);
+        let scheme = if pool_key.use_tls { "https" } else { "http" };
+        let authority = if domain != "-" { domain } else { pool_key.host.as_str() };
+        let h2_uri = format!("{}://{}{}", scheme, authority, upstream_path);
         let mut upstream_req = Request::builder()
             .method(method)
             .uri(&h2_uri);
 
+        // Remove Host header for H2 — :authority pseudo-header (from URI) is sufficient
+        let mut upstream_headers = upstream_headers;
+        upstream_headers.remove("host");
+
         if let Some(headers) = upstream_req.headers_mut() {
             *headers = upstream_headers;
         }
@@ -1102,7 +1135,7 @@ impl HttpProxyService {
             Ok(resp) => {
                 // Register in pool only after request succeeds
                 self.connection_pool.register_h2(pool_key.clone(), sender);
-                let result = self.build_streaming_response(resp, route, route_id, source_ip).await;
+                let result = self.build_streaming_response(resp, route, route_id, source_ip, conn_activity).await;
                 // Close the fresh backend connection (opened above)
                 self.metrics.backend_connection_closed(&backend_key);
                 result
@@ -1129,7 +1162,7 @@ impl HttpProxyService {
         io: TokioIo<BackendStream>,
         parts: hyper::http::request::Parts,
         body: Incoming,
-        upstream_headers: hyper::HeaderMap,
+        mut upstream_headers: hyper::HeaderMap,
         upstream_path: &str,
         upstream: &crate::upstream_selector::UpstreamSelection,
         route: &rustproxy_config::RouteConfig,
@@ -1138,14 +1171,16 @@ impl HttpProxyService {
         pool_key: &crate::connection_pool::PoolKey,
         requested_host: Option<String>,
         domain: &str,
+        conn_activity: &ConnActivity,
     ) -> Result<Response<BoxBody<Bytes, hyper::Error>>, hyper::Error> {
         let exec = hyper_util::rt::TokioExecutor::new();
         let mut h2_builder = hyper::client::conn::http2::Builder::new(exec);
         h2_builder
+            .timer(hyper_util::rt::TokioTimer::new())
             .keep_alive_interval(std::time::Duration::from_secs(10))
             .keep_alive_timeout(std::time::Duration::from_secs(5))
-            .adaptive_window(true)
-            .initial_stream_window_size(2 * 1024 * 1024);
+            .initial_stream_window_size(2 * 1024 * 1024)
+            .initial_connection_window_size(16 * 1024 * 1024);
         let handshake_result = tokio::time::timeout(
             self.connect_timeout,
             h2_builder.handshake(io),
@@ -1181,7 +1216,7 @@ impl HttpProxyService {
                         let fallback_io = TokioIo::new(fallback_backend);
                         let result = self.forward_h1(
                             fallback_io, parts, body, upstream_headers, upstream_path,
-                            upstream, route, route_id, source_ip, &h1_pool_key, domain,
+                            upstream, route, route_id, source_ip, &h1_pool_key, domain, conn_activity,
                         ).await;
                         self.metrics.backend_connection_closed(&bk);
                         result
@@ -1199,18 +1234,22 @@ impl HttpProxyService {
                 });
 
                 // Save retry state before consuming parts/body (for bodyless requests like GET)
+                // Clone BEFORE removing Host — H1 fallback needs Host header
                 let retry_state = if body.is_end_stream() {
                     Some((parts.method.clone(), upstream_headers.clone()))
                 } else {
                     None
                 };
 
+                // Remove Host header for H2 — :authority pseudo-header (from URI) is sufficient
+                upstream_headers.remove("host");
+
                 // Build and send the h2 request inline (don't register in pool yet —
                 // we need to verify the request actually succeeds first, because some
                 // backends advertise h2 via ALPN but don't speak the h2 binary protocol).
-                let h2_uri = format!("{}://{}:{}{}",
-                    if upstream.use_tls { "https" } else { "http" },
-                    upstream.host, upstream.port, upstream_path);
+                let scheme = if upstream.use_tls { "https" } else { "http" };
+                let authority = if domain != "-" { domain } else { upstream.host.as_str() };
+                let h2_uri = format!("{}://{}{}", scheme, authority, upstream_path);
                 let mut upstream_req = Request::builder()
                     .method(parts.method)
                     .uri(&h2_uri);
@@ -1225,7 +1264,7 @@ impl HttpProxyService {
                     route_id.map(|s| s.to_string()),
                     Some(source_ip.to_string()),
                     Direction::In,
-                );
+                ).with_connection_activity(Arc::clone(&conn_activity.last_activity), conn_activity.start);
                 let boxed_body: BoxBody<Bytes, hyper::Error> = BoxBody::new(counting_req_body);
                 let upstream_req = upstream_req.body(boxed_body).unwrap();
 
@@ -1233,7 +1272,7 @@ impl HttpProxyService {
                     Ok(upstream_response) => {
                         // H2 works! Register sender in pool for multiplexed reuse
                         self.connection_pool.register_h2(pool_key.clone(), sender);
-                        self.build_streaming_response(upstream_response, route, route_id, source_ip).await
+                        self.build_streaming_response(upstream_response, route, route_id, source_ip, conn_activity).await
                     }
                     Err(e) => {
                         // H2 request failed — backend advertises h2 via ALPN but doesn't
@@ -1266,7 +1305,7 @@ impl HttpProxyService {
                                     let fallback_io = TokioIo::new(fallback_backend);
                                     let result = self.forward_h1_empty_body(
                                         fallback_io, method, headers, upstream_path,
-                                        route, route_id, source_ip, &h1_pool_key, domain,
+                                        route, route_id, source_ip, &h1_pool_key, domain, conn_activity,
                                     ).await;
                                     // Close the reconnected backend connection (opened in reconnect_backend)
                                     self.metrics.backend_connection_closed(&bk);
@@ -1315,7 +1354,7 @@ impl HttpProxyService {
                         let fallback_io = TokioIo::new(fallback_backend);
                         let result = self.forward_h1(
                             fallback_io, parts, body, upstream_headers, upstream_path,
-                            upstream, route, route_id, source_ip, &h1_pool_key, domain,
+                            upstream, route, route_id, source_ip, &h1_pool_key, domain, conn_activity,
                         ).await;
                         // Close the reconnected backend connection (opened in reconnect_backend)
                         self.metrics.backend_connection_closed(&bk);
@@ -1342,6 +1381,7 @@ impl HttpProxyService {
         source_ip: &str,
         pool_key: &crate::connection_pool::PoolKey,
         domain: &str,
+        conn_activity: &ConnActivity,
     ) -> Result<Response<BoxBody<Bytes, hyper::Error>>, hyper::Error> {
         let backend_key = format!("{}:{}", pool_key.host, pool_key.port);
         let (mut sender, conn): (
@@ -1388,7 +1428,7 @@ impl HttpProxyService {
         // Return sender to pool for keep-alive reuse
         self.connection_pool.checkin_h1(pool_key.clone(), sender);
 
-        self.build_streaming_response(upstream_response, route, route_id, source_ip).await
+        self.build_streaming_response(upstream_response, route, route_id, source_ip, conn_activity).await
     }
 
     /// Reconnect to a backend (used for H2→H1 fallback).
@@ -1459,19 +1499,24 @@ impl HttpProxyService {
         source_ip: &str,
         pool_key: Option<&crate::connection_pool::PoolKey>,
         domain: &str,
+        conn_activity: &ConnActivity,
     ) -> Result<Response<BoxBody<Bytes, hyper::Error>>, hyper::Error> {
         // Build absolute URI for H2 pseudo-headers (:scheme, :authority)
-        let h2_uri = if let Some(pk) = pool_key {
-            format!("{}://{}:{}{}",
-                if pk.use_tls { "https" } else { "http" },
-                pk.host, pk.port, upstream_path)
-        } else {
-            upstream_path.to_string()
+        // Use the requested domain as authority (not backend address) so :authority matches Host header
+        let scheme = if pool_key.map(|pk| pk.use_tls).unwrap_or(false) { "https" } else { "http" };
+        let authority = if domain != "-" { domain } else {
+            pool_key.map(|pk| pk.host.as_str()).unwrap_or("localhost")
         };
+        let h2_uri = format!("{}://{}{}", scheme, authority, upstream_path);
         let mut upstream_req = Request::builder()
             .method(parts.method)
             .uri(&h2_uri);
 
+        // Remove Host header for H2 — :authority pseudo-header (from URI) is sufficient
+        // Having both Host and :authority causes nginx to return 400
+        let mut upstream_headers = upstream_headers;
+        upstream_headers.remove("host");
+
         if let Some(headers) = upstream_req.headers_mut() {
             *headers = upstream_headers;
         }
@@ -1483,7 +1528,7 @@ impl HttpProxyService {
             route_id.map(|s| s.to_string()),
             Some(source_ip.to_string()),
             Direction::In,
-        );
+        ).with_connection_activity(Arc::clone(&conn_activity.last_activity), conn_activity.start);
         let boxed_body: BoxBody<Bytes, hyper::Error> = BoxBody::new(counting_req_body);
 
         let upstream_req = upstream_req.body(boxed_body).unwrap();
@@ -1504,7 +1549,7 @@ impl HttpProxyService {
             }
         };
 
-        self.build_streaming_response(upstream_response, route, route_id, source_ip).await
+        self.build_streaming_response(upstream_response, route, route_id, source_ip, conn_activity).await
     }
 
     /// Build the client-facing response from an upstream response, streaming the body.
@@ -1517,6 +1562,7 @@ impl HttpProxyService {
         route: &rustproxy_config::RouteConfig,
         route_id: Option<&str>,
         source_ip: &str,
+        conn_activity: &ConnActivity,
     ) -> Result<Response<BoxBody<Bytes, hyper::Error>>, hyper::Error> {
         let (resp_parts, resp_body) = upstream_response.into_parts();
 
@@ -1537,14 +1583,14 @@ impl HttpProxyService {
             route_id.map(|s| s.to_string()),
             Some(source_ip.to_string()),
             Direction::Out,
-        );
+        ).with_connection_activity(Arc::clone(&conn_activity.last_activity), conn_activity.start);
 
         let body: BoxBody<Bytes, hyper::Error> = BoxBody::new(counting_body);
 
         Ok(response.body(body).unwrap())
     }
 
-    /// Handle a WebSocket upgrade request.
+    /// Handle a WebSocket upgrade request (H1 Upgrade or H2 Extended CONNECT per RFC 8441).
     async fn handle_websocket_upgrade(
         &self,
         req: Request<Incoming>,
@@ -1555,6 +1601,8 @@ impl HttpProxyService {
         upstream_key: &str,
         cancel: CancellationToken,
         source_ip: &str,
+        is_h2: bool,
+        conn_activity: Option<ConnActivity>,
     ) -> Result<Response<BoxBody<Bytes, hyper::Error>>, hyper::Error> {
         use tokio::io::{AsyncReadExt, AsyncWriteExt};
 
@@ -1640,9 +1688,11 @@ impl HttpProxyService {
 
         let (parts, _body) = req.into_parts();
 
+        // H2 Extended CONNECT uses method=CONNECT, but the H1.1 backend expects GET
+        let backend_method = if is_h2 { "GET" } else { parts.method.as_str() };
         let mut raw_request = format!(
             "{} {} HTTP/1.1\r\n",
-            parts.method, upstream_path
+            backend_method, upstream_path
         );
 
         // Copy all original headers (preserving the client's Host header).
@@ -1670,6 +1720,23 @@ impl HttpProxyService {
             }
         }
 
+        // H2 Extended CONNECT doesn't carry H1 WebSocket handshake headers;
+        // inject them so the H1.1 backend can complete the upgrade.
+        if is_h2 {
+            if !parts.headers.contains_key("upgrade") {
+                raw_request.push_str("upgrade: websocket\r\n");
+            }
+            if !parts.headers.contains_key("connection") {
+                raw_request.push_str("connection: Upgrade\r\n");
+            }
+            if !parts.headers.contains_key("sec-websocket-version") {
+                raw_request.push_str("sec-websocket-version: 13\r\n");
+            }
+            if !parts.headers.contains_key("sec-websocket-key") {
+                raw_request.push_str("sec-websocket-key: dGhlIHNhbXBsZSBub25jZQ==\r\n");
+            }
+        }
+
         // Add standard reverse-proxy headers (X-Forwarded-*)
         {
             let original_host = parts.headers.get("host")
@@ -1772,8 +1839,12 @@ impl HttpProxyService {
             ));
         }
 
-        let mut client_resp = Response::builder()
-            .status(StatusCode::SWITCHING_PROTOCOLS);
+        // H1: 101 Switching Protocols; H2: 200 OK (RFC 8441 — hyper requires 2xx for Extended CONNECT upgrade)
+        let mut client_resp = if is_h2 {
+            Response::builder().status(StatusCode::OK)
+        } else {
+            Response::builder().status(StatusCode::SWITCHING_PROTOCOLS)
+        };
 
         if let Some(resp_headers) = client_resp.headers_mut() {
             for line in response_str.lines().skip(1) {
@@ -1784,6 +1855,17 @@ impl HttpProxyService {
                 if let Some((name, value)) = line.split_once(':') {
                     let name = name.trim();
                     let value = value.trim();
+                    // Skip hop-by-hop headers for H2 (forbidden by RFC 9113 §8.2.2)
+                    if is_h2 {
+                        let name_lower = name.to_lowercase();
+                        if name_lower == "upgrade" || name_lower == "connection"
+                            || name_lower == "sec-websocket-accept"
+                            || name_lower == "transfer-encoding"
+                            || name_lower == "keep-alive"
+                        {
+                            continue;
+                        }
+                    }
                     if let Ok(header_name) = hyper::header::HeaderName::from_bytes(name.as_bytes()) {
                         if let Ok(header_value) = hyper::header::HeaderValue::from_str(value) {
                             resp_headers.insert(header_name, header_value);
@@ -1824,6 +1906,11 @@ impl HttpProxyService {
             let last_activity = Arc::new(AtomicU64::new(0));
             let start = std::time::Instant::now();
 
+            // For H2 WebSocket: also update the connection-level activity tracker
+            // to prevent the idle watchdog from killing the H2 connection
+            let conn_act_c2u = conn_activity.as_ref().map(|ca| (Arc::clone(&ca.last_activity), ca.start));
+            let conn_act_u2c = conn_activity.as_ref().map(|ca| (Arc::clone(&ca.last_activity), ca.start));
+
             let la1 = Arc::clone(&last_activity);
             let c2u = tokio::spawn(async move {
                 let mut buf = vec![0u8; 65536];
@@ -1838,6 +1925,9 @@ impl HttpProxyService {
                     }
                     total += n as u64;
                     la1.store(start.elapsed().as_millis() as u64, Ordering::Relaxed);
+                    if let Some((ref ca, ca_start)) = conn_act_c2u {
+                        ca.store(ca_start.elapsed().as_millis() as u64, Ordering::Relaxed);
+                    }
                 }
                 let _ = uw.shutdown().await;
                 total
@@ -1857,6 +1947,9 @@ impl HttpProxyService {
                     }
                     total += n as u64;
                     la2.store(start.elapsed().as_millis() as u64, Ordering::Relaxed);
+                    if let Some((ref ca, ca_start)) = conn_act_u2c {
+                        ca.store(ca_start.elapsed().as_millis() as u64, Ordering::Relaxed);
+                    }
                 }
                 let _ = cw.shutdown().await;
                 total

ts/00_commitinfo_data.ts

@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@push.rocks/smartproxy',
-  version: '25.10.4',
+  version: '25.11.1',
   description: 'A powerful proxy package with unified route-based configuration for high traffic management. Features include SSL/TLS support, flexible routing patterns, WebSocket handling, advanced security options, and automatic ACME certificate management.'
 }